Helio U-10B Courier
Helio Aircraft · United States · first flew 1954 · transport aircraft
The Helio U-10 Courier is a remarkable STOL utility aircraft built around an advanced slat and flap system that gives it extremely low stall speeds and very short take-off and landing performance. The U-10B military designation was used for examples operated by US forces in the Vietnam War era.
Recognition (WEFT)
| W — Wings | High-mounted, straight |
|---|---|
| E — Engines | 1 × piston, nose-mounted |
| F — Fuselage | 9.45 m fuselage |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Exceptional STOL performance with full-span leading-edge slats
- Strut-braced high wing with prominent slat and flap systems
- Used extensively by CIA and USAF in Southeast Asia
The distinctive full-span leading-edge slats visible on the wing's leading edge are the key recognition feature; the strut-braced high wing and unusually large control surfaces also mark the Courier.
Specifications
- The Helio U-10B Courier has a length of 9.45 m (31 ft).
- It has a wingspan of 11.89 m (39 ft).
- Its maximum speed is 243 km/h (151 mph).
- Typical crew: 1-2 + up to 4 passengers.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
Helio Aircraft designed the Courier with a focus on extreme STOL capability, using full-span automatic leading-edge slats, large Fowler flaps, and interconnected ailerons to achieve a stall speed under 50 km/h. The U-10 saw extensive clandestine use by the CIA and USAF Special Operations in Laos and Vietnam for insertion and resupply missions.
Variants
The civil Helio Courier spawned multiple variants; the U-10A, U-10B, and U-10D were the main military sub-variants differing primarily in engine and avionics fit.
Where you'll see it
The U-10 served with USAF Air Commando squadrons and Air America throughout the Vietnam conflict, valued for its ability to operate from tiny jungle clearings. Small numbers also served with several South American and Southeast Asian air forces.
Related aircraft
- Helio H-500 Twin Courier
- Boeing 367-80 (Dash 80)
- Convair R3Y-1 Tradewind
- Lockheed C-121J Constellation
- Lockheed C-130 Hercules
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